Craters on Moon?

Question

If a smaller crater on the moon overlays a larger one, you can conclude that:
a.both craters are very old
b.the smaller crater is younger than the larger one
c.the smaller crater is older than the lager one
d.both craters are the same age

Answer 1

Well if the small crater is on top then the larger crater had to be there first. Otherwise the larger impactor would have obliterated the small crater if the large crater had happened second.

Answer 2

I agree with the others. I dont think we can determine the age of a crater just by looking at it. There is no wind to blow dust into the crater so a crater a week old should look identical to one which is 10 years old or 1000 years old. The apollo astronaut's footprints are supposed to be perfectly preserved decades later.
I agree that a larger crater would obliterate a smaller one if it hit the same area, so your hypothesis b would be correct. Its the only way to determine relative age. i.e. if you can see the smaller one over the larger one then it hit later, but how much later you couldnt tell unless you had a chart of the surface of the moon and noticed the difference.

Answer 3

Asteroids may be stable rock; a sort of combination rock (that’s the place the asteroid isn't stable, yet similar to pumice – in spite of the fact that not actually pumice) and then there is nickel-iron (this is particularly dense and heavy). the size of the crater will pertains to the kinetic ability because of the fee and mass of the impression merchandise; and likewise its length (and as a result density). The Newtonian kinetic ability equation (for a factor merchandise) is Ek = ½ mv^2 (in SI gadgets) so as that and merchandise of 50Kg (one hundred ten lb) vacationing at fifty 4 kph or 15 m/s (34mph) has a kinetic ability of 5,625 Jules. Ek = ½ x 50 x 15^2 = 5,625 (So two times the fee will bring about 4 situations the kinetic ability!) Then, in case you have 2 products of distinctive sizes however the comparable mass the bigger (in quantity) merchandise will produce a sallower author because of the fact its impression ability would be unfold over a bigger area.

Answer 4

Definitely B, because if the larger one was to come after the smaller one you wouldn't be able to see the smaller one...

Answer 5

a & d doesnt make sense as the age cannot be decided with the information we have.

b is most suitable and logical answer to this question.

Answer 6

Definitely B is the answer.

Answer 7

B

Answer 8

B